Stroller frame



FIG. 1 is a perspective view of a stroller frame, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a perspective view showing the stroller frame in use.

The drink and snack tray shown in broken lines viewed in FIG. 7 forms no part of the claimed design. 

CLAIM The ornamental design for a stroller frame, as shown and described. 